Comptes Rendus
Turbulence
On three-dimensional bluff body wake symmetry breaking with free-stream turbulence and residual asymmetry
Comptes Rendus. Mécanique, Volume 348 (2020) no. 6-7, pp. 509-517.

The paper reports on the bi-stable turbulent wake dynamics of a three-dimensional bluff body. It is shown that the occurrence of the switching between the two wake states decreases as the turbulent intensity of the incoming flow is made larger by an additional upstream grid. A detailed analysis of the jumps statistics indicates that the turbulent fluctuation of each wake state is also decreased. It is concluded that the states switching is thus triggered by large fluctuations produced by the wake instabilities and not by those of the incoming flow. It is also shown that increasing the free-stream turbulence intensity reinforces the permanent asymmetry of each state and increases the wake sensitivity to residual asymmetries.

Publié le :
DOI : 10.5802/crmeca.32
Mots clés : Turbulence, Instability, Wake, Asymmetry, Reversals, Aerodynamics, Analogy
Olivier Cadot 1 ; Maha Almarzooqi 2, 1 ; Antoine Legeai 3, 1 ; Vladimir Parezanović 2 ; Luc Pastur 3

1 School of Engineering, University of Liverpool, Liverpool L69 3GH, UK
2 Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE
3 IMSIA-ENSTA ParisTech, 828 Bd des Maréchaux F-91762 Palaiseau, France
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits
@article{CRMECA_2020__348_6-7_509_0,
     author = {Olivier Cadot and Maha Almarzooqi and Antoine Legeai and Vladimir Parezanovi\'c and Luc Pastur},
     title = {On three-dimensional bluff body wake symmetry breaking with free-stream turbulence and residual asymmetry},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {509--517},
     publisher = {Acad\'emie des sciences, Paris},
     volume = {348},
     number = {6-7},
     year = {2020},
     doi = {10.5802/crmeca.32},
     language = {en},
}
TY  - JOUR
AU  - Olivier Cadot
AU  - Maha Almarzooqi
AU  - Antoine Legeai
AU  - Vladimir Parezanović
AU  - Luc Pastur
TI  - On three-dimensional bluff body wake symmetry breaking with free-stream turbulence and residual asymmetry
JO  - Comptes Rendus. Mécanique
PY  - 2020
SP  - 509
EP  - 517
VL  - 348
IS  - 6-7
PB  - Académie des sciences, Paris
DO  - 10.5802/crmeca.32
LA  - en
ID  - CRMECA_2020__348_6-7_509_0
ER  - 
%0 Journal Article
%A Olivier Cadot
%A Maha Almarzooqi
%A Antoine Legeai
%A Vladimir Parezanović
%A Luc Pastur
%T On three-dimensional bluff body wake symmetry breaking with free-stream turbulence and residual asymmetry
%J Comptes Rendus. Mécanique
%D 2020
%P 509-517
%V 348
%N 6-7
%I Académie des sciences, Paris
%R 10.5802/crmeca.32
%G en
%F CRMECA_2020__348_6-7_509_0
Olivier Cadot; Maha Almarzooqi; Antoine Legeai; Vladimir Parezanović; Luc Pastur. On three-dimensional bluff body wake symmetry breaking with free-stream turbulence and residual asymmetry. Comptes Rendus. Mécanique, Volume 348 (2020) no. 6-7, pp. 509-517. doi : 10.5802/crmeca.32. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.32/

[1] S. Douady; Y. Couder Phyllotaxis as a physical self-organized growth process, Phys. Rev. Lett., Volume 68 (1992) no. 13, pp. 2098-2101 | DOI

[2] Y. Couder; L. Pauchard; C. Allain; M. Adda-Bedia; S. Douady The leaf venation as formed in a tensorial field, Eur. Phys. J. B, Volume 28 (2002) no. 2, pp. 135-138 | DOI

[3] Y. Couder; E. Fort Single-particle diffraction and interference at a macroscopic scale, Phys. Rev. Lett., Volume 97 (2006) no. 15, 154101 | DOI

[4] A. Eddi; E. Fort; F. Moisy; Y. Couder Unpredictable tunneling of a classical wave-particle association, Phys. Rev. Lett., Volume 102 (2009) no. 24, 240401 | DOI

[5] M. Grandemange; M. Gohlke; O. Cadot Reflectional symmetry breaking of the separated flow over three-dimensional bluff bodies, Phys. Rev. E, Volume 86 (2012), 035302

[6] G. Bonnavion; O. Cadot; V. Herbert; S. Parpais; R. Vigneron; J. Délery Asymmetry and global instability of real minivans’ wake, J. Wind Eng. Ind. Aerodyn., Volume 184 (2019), pp. 77-89 | DOI

[7] D. Fabre; F. Auguste; J. Magnaudet Bifurcations and symmetry breaking in the wake of axisymmetric bodies, Phys. Fluids, Volume 20 (2008), 051702 | DOI | Zbl

[8] D. Ormières; M. Provansal Transition to turbulence in the wake of a sphere, Phys. Rev. Lett., Volume 83 (1999) no. 1, pp. 80-83 | DOI

[9] F. Moon; P. Holmes A magnetoelastic strange attractor, J. Sound Vib., Volume 65 (1979) no. 2, pp. 275-296 | DOI | Zbl

[10] G. Rigas; A. Morgans; R. D. Brackston; J. Morrison Diffusive dynamics and stochastic models of turbulent axisymmetric wakes, J. Fluid Mech., Volume 778 (2015), p. R2 | DOI | MR | Zbl

[11] R. D. Brackston; J. García De La Cruz; A. Wynn; G. Rigas; J. F. Morrison Stochastic modelling and feedback control of bistability in a turbulent bluff body wake, J. Fluid Mech., Volume 802 (2016), pp. 726-749 | DOI | MR

[12] S. Ahmed; G. Ramm; G. Faitin Some salient features of the time-averaged ground vehicle wake, SAE Technical Paper (1984), 840300 | DOI

[13] M. Grandemange; M. Gohlke; O. Cadot Turbulent wake past a three-dimensional blunt body. Part 1. Global modes and bi-stability., J. Fluid Mech., Volume 722 (2013), pp. 51-84 | DOI | Zbl

[14] M. Kiya; Y. Abe Turbulent elliptic wakes, J. Fluids Struct., Volume 13 (1999) no. 7-8, pp. 1041-1067 | DOI

[15] M. Grandemange; M. Gohlke; O. Cadot Turbulent wake past a three-dimensional blunt body. Part 2. Experimental sensitivity analysis., J. Fluid Mech., Volume 752 (2014), pp. 439-461 | DOI

[16] G. Bonnavion; O. Cadot Unstable wake dynamics of rectangular flat-backed bluff bodies with inclination and ground proximity, J. Fluid Mech., Volume 854 (2018), pp. 196-232 | DOI

[17] E. Varon; Y. Eulalie; S. Edwige; P. Gilotte; J.-L. Aider Chaotic dynamics of large-scale structures in a turbulent wake, Phys. Rev. Fluids, Volume 2 (2017), 034604 | DOI

[18] L. Dalla Longa; O. Evstafyeva; A. Morgans Simulations of the bi-modal wake past three-dimensional blunt bluff bodies, J. Fluid Mech., Volume 866 (2019), pp. 791-809 | DOI | MR | Zbl

[19] J. Gerrard The mechanics of the formation region of vortices behind bluff bodies, J. Fluid Mech., Volume 25 (1966) no. 02, pp. 401-413

Cité par Sources :

Commentaires - Politique


Ces articles pourraient vous intéresser

Optimal streaks in the wake of a blunt-based axisymmetric bluff body and their influence on vortex shedding

Mathieu Marant; Carlo Cossu; Grégory Pujals

C. R. Méca (2017)


Control of vortex shedding on a circular cylinder using self-adaptive hairy-flaps

Sebastian Kunze; Christoph Brücker

C. R. Méca (2012)


Active control of the flow behind a two-dimensional bluff body in ground proximity

Sébastien Chaligné; Thomas Castelain; Marc Michard; ...

C. R. Méca (2013)